package com.imooc.sell.utils;

import java.util.Random;

public class KeyUtil {
    /*
    生产唯一主键
    格式：时间+随机数
     */
    public static synchronized String genUniqueKey() {
        Random random = new Random();
        System.currentTimeMillis();

        Integer number = random.nextInt(900000) + 100000;

        return System.currentTimeMillis() + String.valueOf(number);


    }
}
